28287036 has 24 divisors (see below), whose sum is σ = 73337040. Its totient is φ = 9428976.

The previous prime is 28287013. The next prime is 28287053. The reversal of 28287036 is 63078282.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130851 + ... + 131066.

It is an arithmetic number, because the mean of its divisors is an integer number (3055710).

Almost surely, 2^28287036 is an apocalyptic number.

It is an amenable number.

28287036 is an abundant number, since it is smaller than the sum of its proper divisors (45050004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28287036 is a wasteful number, since it uses less digits than its factorization.

28287036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261930 (or 261922 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 28287036 is about 5318.5558190170. Note that the first 3 decimals coincide. The cubic root of 28287036 is about 304.6930029302.

The spelling of 28287036 in words is "twenty-eight million, two hundred eighty-seven thousand, thirty-six".